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A steel rod of length 1 m rests on a smo...

A steel rod of length 1 m rests on a smooth horizontal base. If it is heated from `0^(@) C " to " 100^(@)` C, what is the longitudinal stress developed ?
`(y = 9 xx 10^(9) N//m , alpha = 10 xx 10^(-6) ""^(@) C^(-1))`

A

zero

B

0.0012

C

9 Pa

D

`9 xx 10^(-4)` Pa

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The correct Answer is:
A
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